In other words, these sources claim that you can't buy a property solely for investment purposes (like renting it out) without living in it yourself.Is anyone familiar with this law or regulation?

Especially for MTR, I want to establish relationships with these companies to lock down my niche.

For older demographics, consider the availability of medical centers, entertainment, and restaurants.Buildings/Permits: Assess the city's growth compared to previous years.Determine if the city can accommodate future supply.Government Regulations: Examine the city's efforts and the type of businesses they are targeting.

New unit construction cost's are at/near all time record highs in terms of production costs (labor, material, regulations, tax's etc.).

This is true even if you set up a business and establish a track record. 

Hey Fisher,Yes, you can live in your garage and rent out rooms in your house, provided that the garage is properly converted into a habitable living space according to local building codes and regulations.

Tech companies are continuously moving here and establishing a footprint in Columbus as well.

They're very well established so I feel pretty comfortable with the sponsor and their track record.

Being that I am do not in incorporated Palm Springs, I do not fall under the city's short term rental regulations.

I'd do it as an STR, that way when permits/regulations come in you can be grandfathered in.